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<div class="header">
  <div class="headertitle"><div class="title">VIA6522.h</div></div>
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<a href="_v_i_a6522_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/*</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment">  Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - &lt;http://www.fabgl.com&gt;</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment">  Copyright (c) 2019-2022 Fabrizio Di Vittorio.</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment">  All rights reserved.</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"></span> </div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"></span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment">* Please contact fdivitto2013@gmail.com if you need a commercial license.</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"></span> </div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"></span> </div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment">* This library and related software is available under GPL v3.</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"></span> </div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment">  FabGL is free software: you can redistribute it and/or modify</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment">  it under the terms of the GNU General Public License as published by</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment">  the Free Software Foundation, either version 3 of the License, or</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment">  (at your option) any later version.</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"></span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment">  FabGL is distributed in the hope that it will be useful,</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">  but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment">  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="comment">  GNU General Public License for more details.</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="comment"></span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="comment">  You should have received a copy of the GNU General Public License</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="comment">  along with FabGL.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="comment"> */</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span> </div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span> </div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span> </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span><span class="preprocessor">#include &lt;stdlib.h&gt;</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span><span class="preprocessor">#include &lt;stdint.h&gt;</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span> </div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span><span class="preprocessor">#include &quot;<a class="code" href="fabgl_8h.html">fabgl.h</a>&quot;</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span> </div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span> </div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span><span class="preprocessor">#define DEBUG6522 0</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span> </div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span><span class="keyword">namespace </span>fabgl {</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span> </div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span> </div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span><span class="comment">// VIA (6522 - Versatile Interface Adapter)</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span> </div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span> </div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span><span class="comment">// VIA registers</span></div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span><span class="preprocessor">#define VIA_REG_ORB_IRB         0x0</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span><span class="preprocessor">#define VIA_REG_ORA_IRA         0x1</span></div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span><span class="preprocessor">#define VIA_REG_DDRB            0x2</span></div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span><span class="preprocessor">#define VIA_REG_DDRA            0x3</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span><span class="preprocessor">#define VIA_REG_T1_C_LO         0x4</span></div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span><span class="preprocessor">#define VIA_REG_T1_C_HI         0x5</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span><span class="preprocessor">#define VIA_REG_T1_L_LO         0x6</span></div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span><span class="preprocessor">#define VIA_REG_T1_L_HI         0x7</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span><span class="preprocessor">#define VIA_REG_T2_C_LO         0x8</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span><span class="preprocessor">#define VIA_REG_T2_C_HI         0x9</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span><span class="preprocessor">#define VIA_REG_SR              0xa</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span><span class="preprocessor">#define VIA_REG_ACR             0xb   </span><span class="comment">// Auxiliary Control Register</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span><span class="preprocessor">#define VIA_REG_PCR             0xc   </span><span class="comment">// Peripherical Control Register</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span><span class="preprocessor">#define VIA_REG_IFR             0xd   </span><span class="comment">// Interrupt Flag Register</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span><span class="preprocessor">#define VIA_REG_IER             0xe   </span><span class="comment">// Interrupt Enable Register</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span><span class="preprocessor">#define VIA_REG_ORA_IRA_NH      0xf</span></div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span> </div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span><span class="comment">// IER: VIA interrupt enable/disable bit mask</span></div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span><span class="preprocessor">#define VIA_IER_CA2             0x01</span></div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span><span class="preprocessor">#define VIA_IER_CA1             0x02</span></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span><span class="preprocessor">#define VIA_IER_SR              0x04</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span><span class="preprocessor">#define VIA_IER_CB2             0x08</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span><span class="preprocessor">#define VIA_IER_CB1             0x10</span></div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span><span class="preprocessor">#define VIA_IER_T2              0x20</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span><span class="preprocessor">#define VIA_IER_T1              0x40</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span><span class="preprocessor">#define VIA_IER_CTRL            0x80  </span><span class="comment">// 0 = Logic 1 in bits 0-6 disables the corresponding interrupt, 1 = Logic 1 in bits 0-6 enables the corresponding interrupt</span></div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span> </div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span><span class="comment">// VIA, ACR flags</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span><span class="preprocessor">#define VIA_ACR_T2_COUNTPULSES  0x20</span></div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span><span class="preprocessor">#define VIA_ACR_T1_FREERUN      0x40</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span><span class="preprocessor">#define VIA_ACR_T1_OUTENABLE    0x80</span></div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span> </div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span> </div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"><a class="line" href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#ga69838990f93c3301289776790e4fc0e0">   91</a></span><span class="keyword">enum class</span> <a class="code hl_enumeration" href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#ga69838990f93c3301289776790e4fc0e0">VIA6522Port</a> {</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>  <a class="code hl_enumvalue" href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#gga69838990f93c3301289776790e4fc0e0a06f6a489209115c5cef3f45036aad3ec">PA</a>,  </div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span>  <a class="code hl_enumvalue" href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#gga69838990f93c3301289776790e4fc0e0acd203ccd68b84de1c5df8fd890e104e0">PB</a>,  </div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>  <a class="code hl_enumvalue" href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#gga69838990f93c3301289776790e4fc0e0ac93bf9a243a391a65da5b60116ee9a5c">CA1</a>, </div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>  <a class="code hl_enumvalue" href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#gga69838990f93c3301289776790e4fc0e0a3702f3bfbd91df0d6105cbd8b8d8b963">CA2</a>, </div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span>  <a class="code hl_enumvalue" href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#gga69838990f93c3301289776790e4fc0e0ac479bbda96996453098aaa0687a9197e">CB1</a>, </div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span>  <a class="code hl_enumvalue" href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#gga69838990f93c3301289776790e4fc0e0a96d495d6079a5d50e1b6bc3fc9255f09">CB2</a>, </div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span>};</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span> </div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span> </div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span><span class="preprocessor">#if DEBUG6522</span></div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span><span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> * VIAREG2STR[] = { <span class="stringliteral">&quot;ORB_IRB&quot;</span>, <span class="stringliteral">&quot;ORA_IRA&quot;</span>, <span class="stringliteral">&quot;DDRB&quot;</span>, <span class="stringliteral">&quot;DDRA&quot;</span>, <span class="stringliteral">&quot;T1_C_LO&quot;</span>, <span class="stringliteral">&quot;T1_C_HI&quot;</span>, <span class="stringliteral">&quot;T1_L_LO&quot;</span>, <span class="stringliteral">&quot;T1_L_HI&quot;</span>, <span class="stringliteral">&quot;T2_C_LO&quot;</span>, <span class="stringliteral">&quot;T2_C_HI&quot;</span>, <span class="stringliteral">&quot;SR&quot;</span>, <span class="stringliteral">&quot;ACR&quot;</span>, <span class="stringliteral">&quot;PCR&quot;</span>, <span class="stringliteral">&quot;IFR&quot;</span>, <span class="stringliteral">&quot;IER&quot;</span>, <span class="stringliteral">&quot;ORA_IRA_NH&quot;</span> };</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span> </div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span> </div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"><a class="line" href="classfabgl_1_1_v_i_a6522.html">  109</a></span><span class="keyword">class </span><a class="code hl_class" href="classfabgl_1_1_v_i_a6522.html">VIA6522</a> {</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span><span class="keyword">public</span>:</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span> </div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>  <span class="comment">// callbacks</span></div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>  <span class="keyword">typedef</span> void (*PortOutputCallback)(<span class="keywordtype">void</span> * context, <a class="code hl_class" href="classfabgl_1_1_v_i_a6522.html">VIA6522</a> * via, <a class="code hl_enumeration" href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#ga69838990f93c3301289776790e4fc0e0">VIA6522Port</a> port);</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span>  <span class="keyword">typedef</span> void (*PortInputCallback)(<span class="keywordtype">void</span> * context, <a class="code hl_class" href="classfabgl_1_1_v_i_a6522.html">VIA6522</a> * via, <a class="code hl_enumeration" href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#ga69838990f93c3301289776790e4fc0e0">VIA6522Port</a> port);</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span> </div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>  <a class="code hl_class" href="classfabgl_1_1_v_i_a6522.html">VIA6522</a>(<span class="keywordtype">int</span> tag);</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span> </div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>  <span class="keywordtype">void</span> setCallbacks(<span class="keywordtype">void</span> * context, PortInputCallback portIn, PortOutputCallback portOut) {</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>    m_context = context;</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>    m_portIn  = portIn;</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>    m_portOut = portOut;</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>  }</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span> </div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>  <span class="keywordtype">void</span> reset();</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span> </div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span>  <span class="keywordtype">void</span> writeReg(<span class="keywordtype">int</span> reg, <span class="keywordtype">int</span> value);</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span>  <span class="keywordtype">int</span> readReg(<span class="keywordtype">int</span> reg);</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span> </div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span>  <span class="keywordtype">bool</span> tick(<span class="keywordtype">int</span> cycles);</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span> </div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span>  <span class="comment">// set/get &quot;external&quot; state of PA</span></div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>  uint8_t PA()                       { <span class="keywordflow">return</span> m_PA; }</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span>  <span class="keywordtype">void</span> setPA(<span class="keywordtype">int</span> value);</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span>  <span class="keywordtype">void</span> setBitPA(<span class="keywordtype">int</span> bit, <span class="keywordtype">bool</span> value);</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span>  <span class="keywordtype">void</span> openBitPA(<span class="keywordtype">int</span> bit);</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span> </div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span>  <span class="comment">// set/get &quot;external&quot; state of PB</span></div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span>  uint8_t PB()                       { <span class="keywordflow">return</span> m_PB; }</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span>  <span class="keywordtype">void</span> setPB(<span class="keywordtype">int</span> value);</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span>  <span class="keywordtype">void</span> setBitPB(<span class="keywordtype">int</span> bit, <span class="keywordtype">bool</span> value);</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span>  <span class="keywordtype">void</span> openBitPB(<span class="keywordtype">int</span> bit);</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span> </div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>  uint8_t CA1()                      { <span class="keywordflow">return</span> m_CA1; }</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span>  <span class="keywordtype">void</span> setCA1(<span class="keywordtype">int</span> value)             { m_CA1_prev = m_CA1; m_CA1 = value; }</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span> </div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>  uint8_t CA2()                      { <span class="keywordflow">return</span> m_CA2; }</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>  <span class="keywordtype">void</span> setCA2(<span class="keywordtype">int</span> value)             { m_CA2_prev = m_CA2; m_CA2 = value; }</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span> </div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span>  uint8_t CB1()                      { <span class="keywordflow">return</span> m_CB1; }</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>  <span class="keywordtype">void</span> setCB1(<span class="keywordtype">int</span> value)             { m_CB1_prev = m_CB1; m_CB1 = value; }</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span> </div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span>  uint8_t CB2()                      { <span class="keywordflow">return</span> m_CB2; }</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span>  <span class="keywordtype">void</span> setCB2(<span class="keywordtype">int</span> value)             { m_CB2_prev = m_CB2; m_CB2 = value; }</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span> </div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span>  uint8_t DDRA()                     { <span class="keywordflow">return</span> m_DDRA; }</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span> </div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span>  uint8_t DDRB()                     { <span class="keywordflow">return</span> m_DDRB; }</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span> </div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span>  uint8_t tag()                      { <span class="keywordflow">return</span> m_tag; }</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span> </div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span> </div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span><span class="keyword">private</span>:</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span> </div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span>  uint8_t       m_tag;</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span> </div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span>  <span class="comment">// timers</span></div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>  <span class="keywordtype">int</span>           m_timer1Counter;</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span>  uint16_t      m_timer1Latch;</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span>  <span class="keywordtype">int</span>           m_timer2Counter;</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span>  uint8_t       m_timer2Latch;     <span class="comment">// timer 2 latch is 8 bits</span></div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span>  <span class="keywordtype">bool</span>          m_timer1Triggered;</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span>  <span class="keywordtype">bool</span>          m_timer2Triggered;</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span> </div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span>  <span class="comment">// CA1, CA2</span></div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span>  uint8_t       m_CA1;</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span>  uint8_t       m_CA1_prev;</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span>  uint8_t       m_CA2;</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span>  uint8_t       m_CA2_prev;</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span> </div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span>  <span class="comment">// CB1, CB2</span></div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span>  uint8_t       m_CB1;</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span>  uint8_t       m_CB1_prev;</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span>  uint8_t       m_CB2;</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span>  uint8_t       m_CB2_prev;</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span> </div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span>  <span class="comment">// PA, PB</span></div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span>  uint8_t       m_DDRA;</div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span>  uint8_t       m_DDRB;</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span>  uint8_t       m_PA;     <span class="comment">// what actually there is out of 6522 port A</span></div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span>  uint8_t       m_PB;     <span class="comment">// what actually there is out of 6522 port B</span></div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span>  uint8_t       m_IRA;    <span class="comment">// input register A</span></div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span>  uint8_t       m_IRB;    <span class="comment">// input register B</span></div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span>  uint8_t       m_ORA;    <span class="comment">// output register A</span></div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span>  uint8_t       m_ORB;    <span class="comment">// output register B</span></div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span> </div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span>  uint8_t       m_IFR;</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span>  uint8_t       m_IER;</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span>  uint8_t       m_ACR;</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span>  uint8_t       m_PCR;</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span>  uint8_t       m_SR;</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span> </div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span>  <span class="comment">// callbacks</span></div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span>  <span class="keywordtype">void</span> *             m_context;</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>  PortInputCallback  m_portIn;       <span class="comment">// input callback</span></div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span>  PortOutputCallback m_portOut;      <span class="comment">// output callback</span></div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span> </div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span><span class="preprocessor">  #if DEBUG6522</span></div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span>  <span class="keywordtype">int</span>           m_tick;</div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span><span class="preprocessor">  #endif</span></div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span>};</div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span> </div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span> </div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span>};  <span class="comment">// namespace fabgl</span></div>
<div class="ttc" id="aclassfabgl_1_1_v_i_a6522_html"><div class="ttname"><a href="classfabgl_1_1_v_i_a6522.html">fabgl::VIA6522</a></div><div class="ttdoc">VIA 6522 emulator.</div><div class="ttdef"><b>Definition:</b> <a href="_v_i_a6522_8h_source.html#l00109">VIA6522.h:109</a></div></div>
<div class="ttc" id="afabgl_8h_html"><div class="ttname"><a href="fabgl_8h.html">fabgl.h</a></div><div class="ttdoc">This file is the all in one include file. Application can just include this file to use FabGL library...</div></div>
<div class="ttc" id="agroup___enumerations_ga69838990f93c3301289776790e4fc0e0_html_ga69838990f93c3301289776790e4fc0e0"><div class="ttname"><a href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#ga69838990f93c3301289776790e4fc0e0">fabgl::VIA6522Port</a></div><div class="ttdeci">VIA6522Port</div><div class="ttdoc">I/O port.</div><div class="ttdef"><b>Definition:</b> <a href="_v_i_a6522_8h_source.html#l00091">VIA6522.h:91</a></div></div>
<div class="ttc" id="agroup___enumerations_ga69838990f93c3301289776790e4fc0e0_html_gga69838990f93c3301289776790e4fc0e0a06f6a489209115c5cef3f45036aad3ec"><div class="ttname"><a href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#gga69838990f93c3301289776790e4fc0e0a06f6a489209115c5cef3f45036aad3ec">fabgl::VIA6522Port::PA</a></div><div class="ttdeci">@ PA</div></div>
<div class="ttc" id="agroup___enumerations_ga69838990f93c3301289776790e4fc0e0_html_gga69838990f93c3301289776790e4fc0e0a3702f3bfbd91df0d6105cbd8b8d8b963"><div class="ttname"><a href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#gga69838990f93c3301289776790e4fc0e0a3702f3bfbd91df0d6105cbd8b8d8b963">fabgl::VIA6522Port::CA2</a></div><div class="ttdeci">@ CA2</div></div>
<div class="ttc" id="agroup___enumerations_ga69838990f93c3301289776790e4fc0e0_html_gga69838990f93c3301289776790e4fc0e0a96d495d6079a5d50e1b6bc3fc9255f09"><div class="ttname"><a href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#gga69838990f93c3301289776790e4fc0e0a96d495d6079a5d50e1b6bc3fc9255f09">fabgl::VIA6522Port::CB2</a></div><div class="ttdeci">@ CB2</div></div>
<div class="ttc" id="agroup___enumerations_ga69838990f93c3301289776790e4fc0e0_html_gga69838990f93c3301289776790e4fc0e0ac479bbda96996453098aaa0687a9197e"><div class="ttname"><a href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#gga69838990f93c3301289776790e4fc0e0ac479bbda96996453098aaa0687a9197e">fabgl::VIA6522Port::CB1</a></div><div class="ttdeci">@ CB1</div></div>
<div class="ttc" id="agroup___enumerations_ga69838990f93c3301289776790e4fc0e0_html_gga69838990f93c3301289776790e4fc0e0ac93bf9a243a391a65da5b60116ee9a5c"><div class="ttname"><a href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#gga69838990f93c3301289776790e4fc0e0ac93bf9a243a391a65da5b60116ee9a5c">fabgl::VIA6522Port::CA1</a></div><div class="ttdeci">@ CA1</div></div>
<div class="ttc" id="agroup___enumerations_ga69838990f93c3301289776790e4fc0e0_html_gga69838990f93c3301289776790e4fc0e0acd203ccd68b84de1c5df8fd890e104e0"><div class="ttname"><a href="group___enumerations_ga69838990f93c3301289776790e4fc0e0.html#gga69838990f93c3301289776790e4fc0e0acd203ccd68b84de1c5df8fd890e104e0">fabgl::VIA6522Port::PB</a></div><div class="ttdeci">@ PB</div></div>
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